Knight



(No Model.;

J'. W. MAGKNIGHT.

METHOD 0F LAYING ARTIFICIAL PAVBMENTS.

Patented Aug. 14, 1888..

N.- PETER; Pmwumgmpmr. wa-mngm ne UNITED STATES PATENT OEEICE.

JOHN WESLEY MACKNIGHT, OF NEIV YORK, N. Y.

METHOD OF LAYING ARTIFICIAL PAVEMENTS.

SPECIFICATION forming part of Letters Patent No. 387,724, dated August 14, 1888.

Application filed JuneQS, 1588. Serial No.2781394, (No specimens.)

.To all whom it may concern.:

Be it known that I, .IonN WESLEY MAO- KNIGH'I, of New York city, New York, have invented a new and Improved Method ofLaying Artificial Pavements, of which the following is a specification.

This invention relates to an improved method oflaying an artificial pavement. Its object is more particularly to facilitate the formation of the curb and to form a lapjoint between the various blocks.

The invention consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings, Figure l is atop view of my improved artificial pavement, showing itin the process of laying. Fig. 2 is a vertical longitudinal section on line :c x, Fig. l. Fig. 3 is a similar section, but with all the blocks finished. Fig. 4 is a vertical transverse section,on an enlarged scale, on line y y, Fig. l. Fig. 5 is a perspective View of part of' the mold, and Fig. 6 is a perspective view of part of the joist.

In laying my improved pavement I first form a base of rocks, a, with an upper layer of coal-ashes b. These two layers constitute the foundation of the pavement, and they are spread evenly over the whole surface to be paved. After the foundation is in place, I place across it a number of joists, c, at such distances apart that the space between each pair of joists is equal to the width of each block to be formed. Each joist c hasa downwardly-extending projection, c,which extends over the foundation a b at the curbline, Fig. 4-that is to say, each joist c extends over the layer b from house-line to curb-line, and is then bent down at the curb-line to reach to the gutterline. At the bend thejoist c c is shaped in longitudinal section exactly as the section of the completed block which is to be formed. Thus it is shown to be provided with two arris, c2 c, and with a bead, c. The joists c have at each side a laterally-p roj ecting flange, c5, projecting from end to end of the joist, and extending likewise down along projection c. The ange c5 runs along the upper edge of the joist, so that the joist is T-shaped in crosssection, Fig. 2. After the different joists are put in place, I place over the alternate pairs ofjoists-that is,over joists 1 and 2, overjoists 3 and 4, and overjoists and G,'&c.a mold, cl. This mold is of a size to reach from joist to joist, and it is cut ont so as to conform exactly to the shape of the joist at its bend and its downward projection-that is to say,the parts c2, c3, and 0*,that are represented positively on the joist, are represented negatively in the mold. Figs. l and 2 show two of the molds put in place for the formation of two blocks. In this way the joists and mold form at the bend of each block a chamber closed at its sides and top, but open at the end toward the house-line. The foundation, joists, and molds being thus all put in place, I fill the two top layers that complete the blocks into those spaces that are provided with the molds. In Figs. l and 2 the first and third spaces are thus filled in, and where the pavement is longer all the odd spaces would be similarly treated.

The two top layers consist of the lower layer @,composed of fiinty concrete, and of the upper layer or dressing, f, composed of crushed traprock and cement. Thelower layer,c,ispacked upon the layer b on top of the foundation,and also around the curb. The height of this layer is such that it extends up to a level with the lateral flanges c5 of the j oists c. After the layer e is pnt in place,the top layer, f,is filled in to exactly ll the mold d, and to come up to a level with j oists c. The blocks being thus completed, all the joists and the molds are re moved. The right and left edges of each block will now be step shaped, Fig. 3, the layer e projecting beyond the layerf, and thus the flanges e will be formed. The curbing of each block will also be molded to the required shape.

In order to fill out the intermediate spaces, the molds d are now placed across the samethat is, between the spaces formerly occupied by joists 2 and 3, middle space, Fig. l, 4 and 5, Sac., and the layers c and f are again lled in in like manner, as has already been described with relation to the odd blocks, the only difference being that the joists are no longer used, their foundation being taken up by the edges of the blocks already formed. The intermediate blocks being thus finished, the molds cl are removed and the pavement is completed.

It will be seen that in this pavement the in IOO termediate or even blocks have their top layers, f, resting at each edge upon the flanges eof the odd blocks. In this way the joints between every two adjoining blocks are broken. feter 5 will thus be more Completely excluded, and

the even blocks will be prevented from settling. It Will also be seen that by the use of the joisls Working in cooperation with correspondinglyshnped molds the erris and the bend on the eornerof euch bleek enn be formed With great facility.

Vhat I claim is- 1. The method of forming the curb of nn au ttieinl pavement, which consists in spreading I5 an even foundation forming a chamber by mold and joists around the curb, that is open at its back, and filling the top layer into the chamber and between the joists, so as to eX tend :wound the front and over the top oi' the foundation, substantially as specified.

2. The process of laying un artificial pavement,\vhieh consists in forming ilanges e upon alternate blocks, and then Iilling in tlieintermediate blocks with their top layers, f, resting upon said flanges, substantially as specified.

JOHN XVESLEY MACKNIGHT.

\Vitnesses:

J. S. PnRonNGnn. F. v. BmnsEN. 

